Combined type-writing and computing machine.



B. C. STICKNEY.

COMBINED TYPE WRITING AND COMPUTING MACHINE.

APPLICATION FILED SEPT. 27| I9I3.

Patented June 6 6 SHEETS-SHEET I.

WITN ESS ES I INVENTOR:

B. C. STICKNEY. COMBINED TYPE WRITING AND`CONIPUTING MACHINE.

6 SHEETS-*SHEET 2.

INVENTOR:

B. C. STICKNEY. COMBINED TYPE WRITING AND COMPUTING MACHINE.

APPLICATION FILED SEPT- 27, I9I3. 1,186,521 Patented June 6, 1916.

6 SHEETS-SHEET 3.

WITN ESS yES:

I NVENTOR B. C. STICKNEY. COMBINED TYPE WRITING AoND COMPUTING MACHINE. APPLICATION FILED SEPT. 27, |913.

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B. C. STICKNEY.

COMBINED TYPE WRITING AND COMPUTING MACHINE.

APPLICATION FILED SEPT. 27, 1913.

INVENTUM:

WITN ESISESa B. C. STICKNEY.

COMBINED TYPE WRITING AND COMPUTING MACHINE.

6 SHEETS-SHEET 6.

INVENTORI an sTATiis PATENT OFFICE.

BUENHAM C. STICKNEY, F ELZABETH, NEW JERSEY, ASSIGNOR, BY MESNE ASSIGN MENTS, TO UNDERWOOD COMPUTING MACHINE COMIANY, OF NEW YCRK, N. yYQA CRPQRATION 0F NEW YORK.

CMBINED TYPE-WRITING .AND COMPUTING MACHNI/EV.

LSJSQL Application filed September 27, 1913.

new and useful Improvements in Combinedv Type-Writing and Computing Machines, of which the following is Ia speciication.

This invention relates to c'ompu'ting'machines of the kind in which the numeral keys set up indexing devices, which subsequently controlV the extent to which the number wheels or parts of a register or totalizer are turned by a general operator.

The principal object of the invention is to provide improved means for effecting the operation of a plurality of registers.

ln carrying out the present invention, any suitable registering mechanism of this class may be taken as a basis for a `single register; and one or more additional registers may be operatively connected to the first register to be driven simultaneously therewith; whereby a single set of indexing devices may serve to control the extent of opeintion of several registers or totalizers.

This invention is of importance not only with simple computing machines, but also in connection with machines in which a typewriting mechanism is combined with a computing mechanism. The carriage of the typewriter is usually employed for selecting the denominations, while the keys selectI 'the digits of the indexing mechanism; and by means of a simple device, a single setting ofV the index devicesanswers for two or more registers. rThis greatly simplifies the 'convnections between the `adding mechanism and the typewriter carriage, isters are employed. Y

The wheels usually comprising a register in an Underwood-Hanson machine are usuf ally driven by means of bars whichgare advanced by means oa general operator; said where se verall regbarsflaying racks to engage pinions on the numbei'ilwheels. Said bars also carry index pins, and are also arranged to be displaced one one by means of connections on the Specification of Letters Patent.

Patentes Juno le, 191e. serial No. 792,070.

typewriter carriage at the index-setting operation.

According to the present improvements, the additional register or registers 'are provlded with dead drivingbars, that is, these additional driving bars do'not carry any in` dexing devices, and are not 'connected to the typewriter carriage. Instead, they are connected by means of cross connections to lthe.

4pinions and :i shaft on which they are mounted one pinion meshing with the rack on the main driving bar, and the other meshing with the corresponding rack on the driven bar. These racks are conveniently placed in a row, one behind the other,.the pinions being arranged. in echelon, thus producing a convenient, compact, and easily constructed mechanism.'

Another important'feature of v the invention consists of the .provision of means whereby one of the registers may'either'add or subtract while another register vis adding; and preferably each register is provided with. a sliiftable device sothat it may be either -adding or subtracting or silenced, while each of the remaining registers is either adding, subtracting or silenced,'and will be more fully* explained hereinafter. Thus the machine, by. means of a simple mechanism, is adapted to perorm a great range of. tabula/ting ior calculating loperations by the use .oli onlya single denomination-selecting mechanism.

...lt will be' understood that by the use of only one denoininatioirselecting dog on the comitantly added or subtracted oli-each of two or more registers; and it may be further understood that by the employment of an additional dog or dogs on the typewriter carriage for successively operating the denomination-selecting devices, the numbers written in the second, third and other columns on thesame work-sheet may be also carried into one or more of the registers as required, thus permitting a variety of cross computation, and otherwise increasing the capacity of the machine.

Other objects and advantages will hereinafter appear.

In the accompanying drawings, Figure 1 is a perspective view of one variety of tenscarrying mechanism which may be used in connection with thepresent improvements. Fig. 2 is a sectional view o'l' a clutch device. Fig. 3 :is a sectional elevation of a combined adding and typewriting machine of the Underwood-Hanson type, showing the present improvements embodied therein. Fig. 4 is a sectional plan, showing one register in condition for addition, and one in condition for subtraction, and one silenced or neutral; and also showing the index mechanism and the bars which operate the various registers or totalizers. Fig. 5 'is another sectional plan of the'lower portion of the machine omitting the registers. F 6 is a sectional front elevation showing the forward ends of the register operating bars and cross conn nections between the different sets of bars whereby one set may operate the other sets. Fig.- Tis a sectional side elevation ot the left-handregister'and its appurtenances and connections; this section being taken at about the line .fr-:r of Fig. Fig-S is a side elevation of one ot the hars which operate the major register, this bar carrying a series of index pins and also liaving addition and subtraction racks. and further provided with a rack for driviiig` the. corresponding bar in one or more other-registers. Fig. 9 is a View of a rack such as used for driving the sub-registers; said bar not having any indexing devices or any denominational selecting devices, but having a rack which is driven from the bar seen at Fig. S. Fig. 10 is a sectional rear key in either bolt for locking a subtraction key in either sul'itracting or neutral position. Fig. 11 is a view of the forward part of the main totalizer showing the same a." automatically returned to normal position 4after the completion of the 'forward stroke oi the general operator. Fig. 12 is a view ot theparts as seen at Fig. 7. but illustrating the tenscarrying operation. Fig. 13 is a view similar to Fig. 12. but illustrating the subtraction operation. Fig. 1l is a sectional. side elevation to illustrat\ a subtracting key in its rearmost orsubtracting position. Fig. 15 shows a series ot cams used in the tenscarrying'operation in .that style of register shown in the other drawings: but it will be understood thattlic present improveimfnts may be applied to different kinds of registers. Fig. 16 shows two dogs 126, 127 on the carriage for coming intense successively during the run of the carriage for operating the denomination selecting jacks or lever 124.

Numeral keys 1 and alphabet keys 2 operate levers 3, 4, to vibrate type-bars 5 upwardly, to strike against the front side of a. platen 6 mounted on a carriage 7 which travels on a rail 8, and is controlled by a rack 9 meshing with a pinion 10 connected to an escapement wheel 11. Each type-bar has a heel 12 to engage a universal bar 13 mounted on a frame 14 which operates a rocker 15 having vibratory dogs 1G, 17, to

engage said escapement wheel and permit the carriage to feed step-by-step under the impulse of the usual spring barrel 17, Fig. 3.

The computing mechanism includes an index mechanism which is ope able by the numeral keys; each key having a pendent rod 18 to engage and depress the corresponding one of a series of rock arms 19, which are arrayed across the machine, being mounted upon the Jforward ends of rearwardly extending horizontal rock shafts 20, forming parts of linkages which depress the index pins. Each rock shaft carries an upstanding arm 21 to engage a wrist or pin 22 upon a horizontal link 23, which extends from side to side of the machine. At its ends. each link connects a pair of bell cranks 24.-. the long arms of which are connected by links 26 which descend to press down index pins 27. Each numeral key thus determines the value of the index pin which is depressed or selected, but the typewriter carriage 7 determines the denomination of the depressed pin; each link or depressor bar 26 being capable of de].iressing one pin in earh denomination.

'lhe index pins are arranged in rows upon bars 2S, extending forwardly and rearwardly bene-ith the links 2li, and serving eventually to rotate the m'lniber wheels in a manner presently to be described.

Normally the index pins are out of the path ot movement ot' the depressor bars 26, but as the paper carriage T feeds step-b vstep. the bars 28 are displaced forwardly one alter another, to positions to bring their pins within range of the depressor bars 26 (see Fig. S), so that any bar 2G may depress the ro'rresp'ondine` pin oi the `forwardly displaced pin bar. Any suitable means may' be employed for displacing the pin bars forwardly one after another during the movement ot the paper carriage; but there is shown hereiin'forthc sake of illustration. a mechanism for this purpose which will presently be referred to.. Such index pins as are depressed, project below the bars 28 on which they are carried, and serve as lugs resetear which are slid in guides on the side walls of the framework and are rigidly united to form a slide or carriage; said 'cross bar 29 forming one of the devices for tying said bars 30 together. This carriage or general operator may be. driven by a crank 31 which is fixed upon a transverse horizontal rook shaft 32, `iournaled at its ends in the framework of the machine, and carrying at its ends segments whieh mesh with idle pin ions 34, the latte:` meshingwithl racks formed upon said general operator side bars 30. A. movement of the crank 31 forwardly from the Fig. B position causes the general operator to drive forwardly, and the bar 29thereon engages any depressed index pins 2T, and drives forward the bars 28 on which they aremounted. At its forward end each of said index pin bars 28' carries an addition rack 8G normally out of mesh with a pinion 37, which is fixed to a number wheel 38 forming one of a gang, there being` one pin bar 28 for each number wheel in said gang. Thesenumber wheels are arranged below a vsight opening 39'in the casing of the machine.

The eross bar 29, which engages the depressed index pins, is placed some distance behind said pins, so asy to permit considerable lost motion of the general operator before the first pin can be engaged by said cross bar, and during this lost motion, the racks 36 become meshed with the number wheel pinions 37. This result is effected in ,the following manner: (larried upon power shaft 3Q and rotated thereby is a disk 40 having a eam 67 which, as soon as the 'crank v31 starts to turn, engages a rider or pawl 41 pivoted at 42 upon an arm 43 of a lever 45, which 1s fixed to and turns upon a transverse horizontal rock-shaft 44,' and swings said lever from the normal position seen at vfig. 3 to the position' seen at Fig. 7,' V,that forwardly 'extending` arm 45a of said 'lever 45 may pull down', by. means of a link 46, a framework whichfcarries said number Wheels on an arbor 49, thus bringing 'the l'pinions 37 into' mesh' with said adding` `Vracks 36.

Hence asthe general operator 'continues to drive forward under the 1m- Apulse of the crank 31, the pinions are turned *clockwisl at llig. 7, andthe number wheels. are turned in the saine forward direction,

thus iwrforminpr addition; each number wheel being advanced to an extent dependent upon which of portion of the return stroke of the crank 3l.

and its shaft 32, the rider or pawl 41 turns counter-clockwise at Fig. Z (the ca1n40 now turning in the reverse direction from that indicated by the arrow at said`f`igiii'e), and by a very slight rotation of said pivot 42, said pawl is rendered no longercapable of supporting 'the arm 43. This' permits springs 4? to draw rearwardly l! -shaped 'or double eanilevers .or arms 47pivote'd at 475, which engage the ends of thereby raise said wheels eiear of the rack bars 36, so that the parts 43 and 45 are restored to their normal positions. lihis movement, which withdrawsthe pinions 37 from the addition raeks 36, takes place before the racks themselves start upon their return or rearward movement to normal position; such return being preferably effected by the same cross bar 29 lwhich presaid arbor 49 and.

`'cross'ban for this purpose, engages lugs 48 i pendentfroni the rack bais in the rear of the cross bar 29, but is arranged to have considerable idle rearward motion (enough to permit collapse of pawl 41) before engaging said lugs 48. I

The arbor 49 on which the lnumber wheels 38 and their pinions 37 aremounted, forms a tie-rod'conneeting the two sides .50 and 51 of a swinging frame, which has bearings or sockets at 52 to swing upon collars 53 carried by a transverse horizontal.

shaft 64; this shaft forming a vconvenient hinged support for said frame 50. 51, and

keeping the computing wheels always in proper relationship to the shaft 54, which is connected to the general operator and carries certain prime movingr tens-carrying devices, as will presently be explained. The side members 50, 51 are also connected by a tie-rod The arm 45n of the shifting le.- ver may be duplicated at '56; and the link 4G may be duplicated at 57; the shaft 44 forming a rigid connection between .45a and 5G,

so that the links 46. 5T. pull down both sides ,Y

idle. as at Fig. 7. duringf the addition operation. This rack is parallel with the addition ra'ek 3G, but above the pinion 37; and is connected by an arm (l0 with the forward end of the bar 28.

To cause the wheels 3S to subtract at the dri ving` strokes of the index bars 2S, it is only necessary to movey the -eomputation fof the number wheel shiftingframe' 50, 51. The links 4G, 57 may be', pivoted at`i58 to VHarms 452, 5G. Upon each ofsaid index pinvll bars :28 is carried not only an addition rack' '36, but also a subtraction rack 59. which is pinions into mesh with the subtraction racks v59, instead of the addition racks 36,

so that the number wheels will be turned bacl'nvardly at the ensuing forward drive of the index bars 28.

When the operator'desires that the wheels 38 shall perform subtraction, he presses rearwardly a subtraction key 61 on the forward end of a rod or bar 62, (having a returning spring 62D) which extends from front to rear of the machine, and slides 0n a rest 62". Between its ends, this rod carries a cam 68, which during the backward thrust of the rod, engages the end of a sleeve 63a (having a returning spring 68D), and forces the same endwise along the shaft 82 together with the cam disk 40, which is fast to said sleeve 63, thus displacing the latter and silencing the pawl 41. At the same time is brought intoplay a second disk 64 having a cam 68 also fast to said sleeve, which disk is effective -only for the purpose ofsubtraction. This disk 64 is arranged to coperate with a follower or pawl 65', which is out of line with the -pawl 41, that is, it works in a different plane; the disk 64 being shifted into the same plane as its pawl 65 when the cam disk 40 is shifted out of engagement with th pawl 41. During the ensuing forward stroke of the general operator, `the cam disk 40 will rotate idly; but the cam disk 64, as seen at Eig. 3, will engage the follower or pawl 65. and thrust down the arm 74; of the lever 45 from normal midway position to the depressed position as seen at Fig. 13, thus drawing upwardly the links 46 and 57, thereby lifting the frame 50, 51. and carrying the pinions 37 into mesh with the subtraction racks 59, so that the latter are enabled to turn the number wheels backwardly during the rei mainder of thefoluvard stroke of the gem' eral operator. On Ythe return stroke. the pawl releases the arm 7l, and then the cam arms 47 draw the pinions clear of the racks 59.

The pawls 41 and 65 are provided vwith springs 66 which restore the pawls to normal positions at the end of the return stroke of the geneal operator. Normally springs` 47 and arms 47a, Figs. 3, 11, hold the lever 45 in its mid Yay position. and the pawls il and 65 stand ready for engagement with their respective cams 67 and 68. as at Figs. 8, 7. These cam disks 40, 64. are splined to vto the shaft 82 by means of a pin 69 carried lon an arm 70 fixed to said shaft, and passilig through a hole in disk 16.

'The carry-over devices comprise an idle pinion 71, meshingwith a rack 72 on the general operator. to connect said operatm' with a pinion 73 on the horizontal. transverse shaft 54 having a helical series of cams or tappets 75 for carrying tens at the addition operation. This shaft turns in' only one direction, and is operated only during the return stroke of the general operator; being for this purpose connected by a ball clutch mechanism 76 to the pinion 73, as seen at Fig. 2. A spring 131rl holds a detent 132, Fig. 4, to prevent backward rotation of the shaft 54.

Each number wheel (except that of low est denomination) has an individual train of mechanism for connecting it to this power-driven tenscarrying shaft 54, but the train is normally broken, and hence the tappets or cams 75 are all normally inef-` fective. Each number wheel 38 (except that of highest denomination) has a starting tooth 77, the function of which is to es tablish a connection from the number wheel ofl neXt higher denomination to the tenscarrying shaft 54.

Each of the trains of connecting devices includes a pawl 78 to mesh with a gear 7 9 fixed upon the number wheel, the pawl having multiple teeth 80, or being in the form of a short rack or pawl 7 8, as shown. Each rack is-normally out of mesh with its gear wheel 7 9, but the general operator operates means to shift it up into mesh with its gear, and the starting tooth 77 operates means also to provide for its subsequent driving movement.

To this end, the'pawl. 78 has a pin-and-slot connection at 81 with a two-armed lever or tumbler between the powerlriven tens-car- -rying cams 75 and the number Wheel rotating pawl 78; this lever being pivoted be- .tween its ends upon an arbor 82, and having lower arm 85 of said lever or rocker has a slot to engage with the pin 81 on the tensearrying'pawl 78,- which by the movement of the rocker. is drawn back from the normal position at Fig. 7. Upon said arm 85 is a cam-like tooth 86, which is swung into the path of the associated tappet 7 5 on thetenscarrying shaft 54. the function of the latterv being to act upon said tooth 86. and thereby return the rocker forward to its normal po sition. During such return movement, the rocker arm 85 carries with it the pawl 78, which, however. has in the meantime been swung up into mesh with the gear 79 of the number wheel next higher than that which carries the setting tooth 77, whose movement has just been mentioned.

The for vard swing of 'the pawl 78 is effected by the engagement of the tappct 75 with the rocker tooth 86, there being provided upon the tens-carrying shaft 54 cam.

the arbor 19 and Which extends forwardly fromthe collars 53 onsaid shaft 54, to rock up and down for .shifting theadding;` pinions into and out of mesh with the drivingA racks 36. By means of said pawl 78, the higher number wheel is advanced one point. The cam 87 has a continuation or dwell portion 90which holds down the rear end 96 of thepavvl 78during the wheel driving move ment, andA which thereupon releases said pawl and permits the forward end thereof 29 to v.be/snapped ldown' by a spring 91 out of mesh .With the gear 7 9; a spring;- detent 92 engaging the vlatter -to hold the number wheel in position. i

At the subtractingr ope-ratiom which 1n- Ags cludes `what may be called tens-borrowing,

the setting tooth 77l on the number wheel, Which is traveling counter-clockwise (Fig: 18), lifts,thea-rm 83 and swings the rocker 4 tothe Fig'. p positizmj,v l p 3mi, AThe. upper arm93;2'of the rocker has a v' tooth: 941 whichisfswung into the path of a f cam or tappet 95 on the power shaft 51; the tappets 95 being spirally arrangeiil and being paired with the tappets 75. The tappets, y 35 95 arein different planes from the tappets 75, and the tooth 91 is correspondingly oli`` setfrom the arm 93. The cam 87 depresses the rear arm 96 of the pawl 7 8 and elevates ythe Vfront arm Athereof into mesh with the .g'Qa179 andA then tl` actingfinp'on thetoo'thf94, swings the rocker 52.33.2152. i90.. ,itlieenorinarimidway position at Fig. 12; thus dra\.vin,n ,A backwardly the pavvl 7 8. fait the conclusion of the tens-bors rowing; operation, the cam 87 releases the rear arm 96 ofthe' pa-wl, and the forward arm of the latter is drawn down by` the 'spring 91 as before. y

Each cam 87, together with its associated tappetsv75j,andlllforms a hogroup, and said pji"oiips`,"as i n 'aftfififn the shaft so that the eomput- 4ively operated by the "Carry-over devices, from lower to higher denominations.

The rocker or tumbler 85, 92%, is held in l any of its three positions by means of a ratch 97pivoted upon a rod 98, which rod connects the side plates '50, 5l, i.it in front oo of. the rodv and said catra is pressed downwardly by ja spring` 99 roiled around ltiie' l :5.62"tli'efeatteli,haring three notches 100. llllfidflOQtol curage a pin 103 on thetumliler At vlhold'tlie same in any ot three -positiona Z 1 explained.

, tappet cumming ory 15, are arranged All lof the tens-carrying trains are mounted upon the swinging frame 50, 51, and the number Wheelswith their pinions,

.detents 92,A gears, and tensoarrying trains,

swing up and down as a unit about said 7a power shaft 54, which serves as a support for the rear end of said frame, as already The raising of the universal plate 108 restores the index pins 27 to nor-v 1 `mal positions. The plate 108 is operated in 75 the usual manner, and is pivoted as usual upon bell cranks 109 loosely mounted on freek `shafts (116) and connected by a link 110. During the last part of the return stroke ao of the general operator, a p'aWl or abutment 111 on aside bar` 30 usually engages an arm 112 secured to one of therook shafts 116 to cause the latter to rock, and the plate 108 to. rise, thereby lifting the index pins 27. Thereupon the arm 112 trips off from the abutment 111 and the plate 108drops.v

1f it be'desired to retain thekey 61 in its rearward position, a bolt 117 maybe slid to the'left by means of av finger-piece 1518 to engagea notch 119 in the rod 62; a spring detent 126 holding` the bolt in either position.. The means for setting said index pin bars forwardly so as to bring the index pins" 27 into register with the pin-*depressing linkages 26, may be of any suitable construction, and may comprise vertical levers 121i pivoted between their ends at 125, the lowetends of these levers being adapted to strike the rear ends of the'indeX pin bars 1o@ 28. Agt their upper ends, these levers are engageable by bevel dogs 126 pivoted upon lugs 127 on the Carriage 7; the levers being arranged at letter-space intervals, so that at each letter-feeding movement of the car- 165 riage 7 one of the levers 1211 is vibrated, and the index pin bar 28 of corresponding denomination is set forwardly, so as to bring its pins within range of the depressors 26.

The levers 121 are so formed that the de- 116 nominational order of their upper ends is the inverse of their lower ends. The dogs 126 are individually pivoted so as to permit them to ride idly over the ends of the levers 124 while the carriage is being returned. 115 Returning'spring's ,128 are provided for the levers 121. and pivotcd fingers 129 are pressed by springs 130 against shoulders 131 l isters ofnumber wheels 134, constructed, equipped and connectedlike the wheels 38 in the main totalizer (which is designated generally as 132). Itwill be understood that all the description as heretofore applied to the register 132, inclusive of the tens-carrying mechanism, applies also to the register 133; and Figs. 1, 11 and 12 are drawings of the register 133 as well as ofthe register 132. The register 133 itself is seen in sectional side elevation at Fig. 7; this register being at the left side of the machine. l

The single indexing mechanism already described, and including the single set of in dex pins 27, is made to 'answer for both reg- 132 and 133. To this end, the number Wheels 134 are connected to the rack bars 28 to be driven thereby. Connection is ef- -fected by means of -a series of cross shafts 135, one for each number wheel. Each shaft has a driving pinion 136 meshing with a rack 137 provided upon the bar 28, and a pinion 138 meshing with a similar rack 139, Figs. 6, 7 and 9, on bars 140, which correspond with the bars 28, and have at their forward ends racks 141 and 142 to'correspond with the racks 36 and 59 on the bars 28, `whereby the pinions 37 of the number wheels 134 arev actuated, the same as in the register 132. It will be noted that the bars 140 are not provided with index pins 27, nor

with carriage-.controlled denomination-selecting devices. The cross-shafts 135 are denominational, the units rack bar 28 being connected by its own cross-shaft with the units bar 140, the tens bar 28 with the tens bar 140, and so on. Thermes-shafts 135 may be placed in a row, or one behind another, Fig. 5, so that the shaft' driving racks 137 may be on the same level, Fig. 3, and the racks 137, as well as the driving racks 139, may be accordingly arranged in eclielon. The bars 140 may be guided in any suitable manner to prevent displacement thereof, as is the case v ith the bars 28. The guides may include forward guide-combs 140a and 1401, and a rear guide comb 140.

From the foregoing, -it will be seen that whenever any number is run up on the ma` `)or register 132, the same number will be run up on the sub-register 133; hence the latter may be employed for subtotal, as for instance, .it may give the 'totals of the items on each of a series of bills, while the major totalizer 132 will give the gross sum of the items on all the bills.

In case three or more registers are required, the cross shafts 135 may be extended to the additional register or registers, and provided with suitable pinions to drive the same. As an illustration, a third register is shown at 143, Fig. 4, having number wheels 144, and being in all respects similar .to registers 132 and 133. This register is operated by bars 145 similar to bars 140, and similai-ly connected by means of pinions 146 on extensions 147 of the cross-shafts 136 these extensions being preferably at the right of said crosseshafts; although the invention is spending wheels in both registers 133 and 143. Thus all three registers may be controlled by a single set of index pins 27, which are selectively set bythe numeral keys of the typewriter. A single denominationselecting mechanism 124, 126, etc., serves for all three registers, and wheneverany number iscarried into the register 132, it is simultaneously carried into the registers 133 vand 143, whereby a variety of work may be performed.

It will be seen at Fig. 3, that the sub-v traction key bar 62 has,besides the lnotch 119 -(which coperates with the bolt 117, Figs. 4 and 10, to hold the subtraction key in subtraction position), a; second notch 148,'

which vbecomes available midway between the addition and subtraction positions of said bar 62, and at such time lmay be engaged by the bolt 117, to silence the major register 132 while one or both of the subregisters 133 and 143 are active. In other words, the index pins 27 may be employed tov the subtraction key 149 of the sub-register without driving the major register 132. At Fig, 4'the key 61 of the` main register is pressed in to the subtraction position, where it can vbe detained by pressing the bolt handle 118 to the left. At the saine figure,

the subtraction key 149 of the sub-register' 143 is shown as pressed back to its midway position, where it is held by its bolt 150, said parts 149 and 150 corresponding to parts 61 and 117. lThus the sub-register 1,43 is silenced or rendered neutrall while the major register 132 is subtracting. It will' be noticed that cam 63 on each of the subtraction shift keys 61 and 149 is provided with a neutralizing surface or portion 151, to hold the shiftable member 63 in a position midway of the extreme positionsto which it may be shifted along the main operating shaft 32, so that both of the cam disks 4() and 64 Will be out of reach of the devices 41 and 65, and hence the number/ wheels will retain their normal'A positions as at Fig. 3, 'disengaged from their driving racks during the forward stroke of the general operator effected by the handle 31. Each cam also` has a portion 152 which always holds the member 63a at the cxtreme right-hand or subtracting position, as sliown'by the major register 132 in Fig. 4. At said figure the subtraction key 153 of the4 1efthand register 133 is shown l "subtracts, or is silenced. By shitting all of the keys to the same position as key 1&9 in Fig. et, all three registers will be silenced or remain neutral, so that they will not be disturbed during the operation of the general operator 31; or allA may be made to add or to subtract. Thus a very great range of Work may be done; and obviously the invention is not limited to theuse of three registers, as either more or less than three may be connected up'to the major driving racks by means of suitably disposed cross drivingshafts or other connections.

Referring to Fig. 1G, additional dogs 126 or 1'27 may be provided on the typewriter carriage 7; and these dogs may be adjusted along the rack forming-part of the usual tabulating mechanism illustrated at Fig. 3. The dogs may be so adjusted that each will operate Lthe jacks "or levers 124 during the Writing ot the corresponding number in the column; so that two columns may be written on the page, and the corresponding numbers carried into the registers. Thus may be performed a great variety of cross addition and other cross computations.y since each of ,the registers'may either add or subtract or remain neutral, While each ot the other registers 'is either adding, subtracting, or remainingl neutral. f

Variations may be resorted to within the scojieot theinvention; and portions oi the improvements may be used Without others.

Having thus described my invention; l claim:

1. ln a combined typewriting and computing machine. the combination ot a plurality of computing heads; actuating devices for each` computinghead; amearriagc movable step-by-'step-g connections operated by the carriage movement for controlling` the denominational vselection of the actuating devices for solely onev of said computin heads; and mea-ns enabling the actuating .devices for that head to control the simultaneous operation of the actuating devices for the remaining' head or heads.

Q. ln a combined typewriting and com-` puting machine; the combination oi" ,a plurality ot' computing` heads; a carriage mov-- able step by stepra single-set oi bars tor driving solely one of said heads: indexing device; determining the 'extent or. such drive; lmeans for setting said devices under control ofthe carriage; means for actuating said bars; and means brought into action by said bars for effecting the siniultaneous drive of the remaining head or heads to the same 1 extent as determined by the set indexing devices. y

ln a combined typewriting and computing machine, the combination of a plurality of computing heads; actuating devices for each computing head; a carriage movable step by step; connections operated by the carriage movement for controlling the denominational selection of the actuatingdevices for solely one ot' said computing heads; means for enabling the actuating devices'for that head to control the sim ultaneous operation of the actuating devices for the remaining head or heads; and a statecontrol device individual to each head for enabling the same to compute either additively or subtractively.

4. In a combined typewriting and computing machine, the combination of a plurality of computing heads; actuating devices Jfor each computing` head; a carriage movable step by step; connections operated by Ithe carriage movement zfor controlling the denominational selection of the actuating devices for solely one of said computing heads; means for enabling the actuating devices for that head to control the simultaneous operation of the actuating devices for the remaining head or heads; and a statecontrol device individual to each head for either silencing the same or causing it to compute either additively or subtractively. Q

5. In a combined typewriting and computing machine, the combination of numeral keys; a plurality of computingv heads; a set of drivers for each head.; a carriage movable step-by-step; means for positively or directly driving solely one of saidA sets of drivers; a single set ot denomination-selecting devices, under the control of said carringe, associated with said positively-driven set of drivers; a single set of indexing devices for settingup a number to be computed, under joint control of said keys and said denominatioil-selecting devices; and connections between said positively-driven .set of drivers and the remaining set or sets thereof. for driving said remaining set or sets equally and concurrently with and from'V liliy said vcarriage and keys, and associated with said positively-driven set ot' drivers; and connections between each driver in said positively-driven set of drivers and the driver of likev denomination inthe remaining set or sets ot' drivers, for driving said remaining or sets equally and concurrently with and from the first-named set, whereby the same munber will be carried into all of said computing heads at the same time.

7. In a combined typewriting and computing.niaehine, the combination of numeral keys: a plurality ot' computing heads; a set of drivers tor each head; a carriage movable step by step; a single set of denominationselecting devices under control of said carriage.; means tor positively driving solely one ot' said sets of drivers; indexing devices for setting up a number to be computed under joint control of said keys and denommation-selecting devices and associated with said positively-driven set of drivers; and a gear train connecting each driver in said positively-driven set with the driver of like denomination in the remaining set or sets,A for driving said remaining or sets equally and concurrently with and from the first-named set, whereby the same number will be carried into all of said computing heads at the same time, said gear trains comprising shafts disposed in a horizontal plane, and pinions mounted on said shafts and a1'- ranged in echelon.

8. In a-combined typewriting and computing machine, the combination of numeral keys; a plurality of computing heads; a set of drivers for each beadzil a 1arriage movable step by step; indexing devices for setting up a number to be computed under joint control of said carriage and keys; means for positively driving solely one ot' said sets ot' drivers; a single set of selecting connections leading from said carriage to said positively-driven set ol drivers; a plurality ot selecting devices carried by said carriage and so arranged that each will operate all ot said selecting connections during a single traverse ot'. said carriage: and connections between said positively-driven set ot' drivers and the remaining set or sets thereot'. t'or driving said remaining set or sets equally and con-l currently with and from the first-named set, whereby the same number will be carried into all ot' said computing heads at the same time.

0. ln a/machine ot the character speci lied, the combination. with a plurality ot' com.- puting heads; ot a set of drivers for each bead. each driver oi each set having a rack for driving the accordant computing wheel ot' the corresponding head, and also'ihaving a separate, auxiliary rack; means for directly or positively actuating solely one set of drivers; and a connection between the auxiliary rack of each driver ot that set and the auxiliary rack of the driver or drivers ot' like denomination in the remaining set orsets, for driving the same equally and concurrently with the first-named rack; whereby the same number will be run into all of said computing heads at one and the same time.

10. In a machine of the character specified, the combination, with a plurality of computing heads; of a set of drivers for each head, each driver ot each set having addition and subtraction racks for driving the accordant computing wheel of the corresponding head in one direction or the other, and also having a separate., auxiliary rack; means for effecting a preliminary relative movement between each'computing head and its associated set ot' drivers, to determine whether the former shall be actuated by the addition racks or the subtraction racks; means for directly or' positively actuating solely one set of drivers; and a connection between the auxiliary rack of each driver of that set and the auxiliary rack of the driver or drivers ot' like denomination in the remaining set or sets, `tor drivingl the same equally and concurrently with the first-named rack, whereby the same numberwill be run into all ot said computing heads at one and the same time.

11. In a machine ot' the character specified, the combination, with a plurality of computing heads; of a set ot drivers for each head, each driver of each set havingr a rack tor driving the accordant computing wheel of the corresponding head, and also having a separate. auxiliary rack arranged beneath and parallel with the rst-named rack: means for directlyor positively actuating solely one set ot drivers; and a connection between the auxiliary rack of each driver ot' that set and the auxiliary rack of the driver or drivers of like denomination in the remaining set or sets, for driving the same equally and concurrently with the first-named rack. whereby the same number will be run into all of said computing heads at one and the same time.

12. ln a machine ot the character specilied, the combination. with a plurality of computing heads; ot a set of drivers for each head, each driver of each set having spaced. parallel addition and subtraction racks 'tor driving the accordant computing wheel ot' the corresponding head in one direetion or the other. and alsoliaving a separate, auxiliary rack arranged beneath and parallel with the first-named racks; means for eftecting a preliminary relative movement betweeneach computing head and its asociated set of drivers, to determine whether the former shall be actuated by the addition racks or the subtraction racks; means for directly or positively actuating will be run into all of said computing heads at one and the' same time.

BURNHAM e. STICKNEY.

Witnesses:

F. E ALEXANDEF, GEO. W. NAYLOR.

be obtained for ve cents eah, by addressing the Commissioner of Paten,

Washington, D. C. 

